The applet below demonstrates that the job can be done. The implementation is pretty rough, but the main point is that you can have a 100x100 cell table scroll rapidly, unlike with JTable.
Note: Your browser has to support loading from a "jar" file. If it doesn't, and you realy want to see this demo, you'll have to download the jar file, extract the classes, and run TableApplet by hand, with "appletviewer" or something.
Note2: YES, THIS IS BUGGY. And there is an additional bug(?) in netscape, where the scrollbars dont kick in right away. Keep playing with them, and it should work.